Procedure and device for correcting transmission errors and detecting errors during data transmission via a data transmission medium

摘要

The apparatus subject of the invention comprises a plurality of transmitting means (11-14) which are connected to a bus (1) via voltage dividing means (21-24) whose value is dimensioned in a way to drive the bus to an intermediate voltage value when a collision condition occurs on the bus (1). To bus (1) threshold means (51, 52) are also connected, for detecting if the signal present on the bus is greater or lower than an high threshold (VHth) and if it is greater or lower than a low threshold (VLth), where there are connected means (61) for assigning a value to the state variable of a finite state machine (61) based on values detected by the threshold means (51, 52). Also, decoding means (60) are provided for determining the correct value of transmitted data, and for detecting the possible presence of a collision situation on the bus based on the value of said state variable. IMAGE